catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names

V1334 Cyg, HR 8157, HD 203156, SAO 71203, BD +37 4271, WDS 21194+3814

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

position, motion, parallax:

position (J2000)	RA: 21h 19min 22.2sec	DEC: +38° 14' 15''
position (B1900)	RA: 21h 15min 22.8sec	DEC: +37° 48' 55''
proper motion (J2000)	RA: 0.011 arcsec/a	DEC: -0.006 arcsec/a
radial velocity	8 km/s note: spectroscopic binaries
rotational velocity	28 km/s (uncertain) (variable)
galactic coordinates	longitude: 83.62°	latitude: -7.95°

magnitude

visual magnitude

5.83 (V on UBV Johnson system)

spectral / color information

spectral class	F1II
B-V-magnitude	0.5
U-B-magnitude	0.16

note (category: spectra):

Also classified F2Ib. IUE observations indicate B6-7 companion.

variability information

variable star identification

V1334 Cyg

note (category: variability):

Delta Cep 5.77 - 5.96V, 3.332816d. Uncertain which component of ADS 14859 is var. Perhaps Delta Sct type.

double/multiple star system information

separation	0.1 arcsec
mag difference (of double or brightest multiple)	0

note (category: double and multiple data):

Binary, sep. 0.130", about 30y. Unresolved by speckle interferometry.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000)	RA: 21h 19min 22.19sec	DEC: +38° 14' 15.09''	±0.35 arcsec	source: 17
proper motion (J2000)	RA: 0.0003 arcsec/a	DEC: 0 arcsec/a		source: 25
radial velocity	8 km/s			source: 25
galactic coord. (B1950)	longitude: 83.63°	latitude: -7.95°

magnitude:

visual	5.8 (observed)	source: 31
photovisual	5.8	source: 2
photographic	6.4	source: 16

spectral information:

spectral class	F2		source: 96
Morgan-Keenan	F1II		source: 25
B-magnitude	6.33 ±0.05	B-V-magnitude	0.5
U-magnitude	6.49 ±0.05	U-B-magnitude	0.16

variability information:

source of data: 30

variability type	115
var. amplitude	0.19
var. period	3.33
var. epoch	2440125 25. September 1968, 12:00:00 UT
next max light	2452219.56 6. November 2001, 01:26:24 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.1 arcsec
magnitude difference between brightest and second brightest component	0
position angle	350 °

sources:

2	HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
17	ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991
19	WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
31	CRM' (non-GCVS variable data)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994
96	SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 21h 17min 22.416sec	DEC: +38° 1' 31.85''	±0.032 arcsec
position (J2000)	RA: 21h 19min 22.247sec	DEC: +38° 14' 14.61''
proper motion B1950 (FK4)	RA: 0.0007 arcsec/a	DEC: -0.003 arcsec/a	±0.008 arcsec/a in RA ±0.007 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0009 arcsec/a	DEC: -0.006 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.8 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	F2
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue	GC, catalogue number: 29847
Durchmusterung	BD+37 4271
Boss General Catalogue	29847
Henry Draper Catalogue	203156

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000)	RA: 21h 19.4min	DEC: +38° 14'
proper motion (J2000)	RA: 0.003 arcsec/a	DEC: 0 arcsec/a

double/multiple star system information:

component	year	number of measures	position angle	angular separation	magnitude of 1st component	magnitude of 2nd component	spectral class(es)	discoverer code
-	1886	28	288°	0.3''	6.6	6.6	F3II	HO 286
	1990		350°	0.1''

discoverer information:

discoverer code	discoverer	reference
HO 286	Hough, G.W.	-

notes:

note	Often seen single. Rapid binary, distances small and quadrants uncertain. One component is a Cepheid, V1334 Cyg.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 21h 17min 22.4sec

DEC: +38° 1' 32''

variability informations:

variability type	DCEPS	pulsating variable star
magnitute at max. brightness	5.77
magnitute at min. brightness	5.96
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2440124.533 25. September 1968, 00:47:31 UT
period [d]	3.332816
next maximum light [JD]	2452219.322264 5. November 2001, 19:44:04 UT
rising time	50 % of period

spectral information

spectral class

F2Ib

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	31/1334
constellation	Cygnus
notes on existence	The star is equivalent to '0311335 V1335'.
There are notes in published catalog.

variability type description

variability type	description
DCEPS	These are Delta Cep variables having light amplitudes <0.5 mag in V (<0.7 mag in B) and almost symmetrical light curves (M-m approx. 0.4 - 0.5 periods); as a rule, their periods do not exceed 7 days. They are probably first-overtone pulsators and/or are in the first transition across the instability strip after leaving the main sequence (SU Cas).